Hydrodynamic Processes Research of the Positive Displacement Hydraulic Machines Piston Interface

The article proposes a method for geometric calculation of gear links of planetary mechanisms in which the central wheels of external and internal gearing have the same number of teeth. The key to solving the problem is the existing possibility of a large positive displacement of the tool when machining the crown with internal involute teeth. The calculation used the formulas GOST 16532–70 and GOST 19274–73, arranged in a certain sequence. The planetary mechanisms under consideration underlie the new volumetric rotary hydraulic machines.

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Structural optimization of the hydraulic drive of a mobile transport and reloading rope complex based on pareto-optimal solutions

Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta ◽

10.22281/2413-9920-2020-06-04-506-517 ◽

2020 ◽

Vol 6 (4) ◽

pp. 506-517

Author(s):

V.I. Tarichko ◽

Keyword(s):

Structural Optimization ◽

Hydraulic Drive ◽

Specific Power ◽

Pareto Optimal ◽

Pareto Optimal Solutions ◽

Optimal Solutions ◽

Positive Displacement ◽

Hydraulic Machines ◽

Difficult Terrain ◽

Rapid Deployment

The article proposes a method of structural optimization of the hydraulic drive of mobile transport and reloading rope complexes based on special multi-axle chassis with increased carrying capacity and cross-country ability. At present, this type of technological machines can be considered as a new class of technological overground transport vehicles, which is an effective alternative to stationary freight ropeways for hard-to-reach areas with difficult terrain and, if necessary, the rapid deployment of transport and logistics operations. An algorithm for the formation of the Pareto set is considered, which consists of a variety of alternative versions of the hydraulic drive based on a combination of positive displacement pumps and hydraulic motors of permissible standard sizes. A criterion for choosing the Pareto-optimal solutions of the designed hydraulic drive is proposed, based on three quality indicators — the total mass of the hydraulic machines, the specific power and the efficiency of the hydraulic drive.

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Hydrodynamic processes in the piston and cylinder unit of axial-piston hydraulic machines

Journal of «Almaz – Antey» Air and Defence Corporation ◽

10.38013/2542-0542-2017-4-86-90 ◽

2017 ◽

pp. 86-90

Author(s):

A. O. Kuz'min ◽

V. V. Popov ◽

S. M. Stazhkov

Keyword(s):

Reynolds Equation ◽

Pressure Field ◽

Fluid Layer ◽

Working Fluid ◽

Sweep Method ◽

Pressure Fields ◽

Hydraulic Machines ◽

Piston Mechanism ◽

Hydrodynamic Processes ◽

Axial Piston

The purpose of the research was to analyze the kinematics of the piston mechanism of an axial-piston hydraulic machine with an adjustable-angle cam plate. The kinematic analysis resulted in establishing various types of relative motion of the piston in the guide bushing, writing and solving Reynolds equation with respect to velocities. A sweep method was used to construct a pressure field in the working fluid layer between the piston and the guide bushing. Pressure fields are constructed for several cases of kinematics of the piston mechanism.

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Hydraulics. Workshop

10.12737/1045068 ◽

2020 ◽

Author(s):

Sergey Vol'vak

Keyword(s):

Land Reclamation ◽

Hydraulic Drive ◽

Hydraulic Transport ◽

Agricultural Water ◽

Technical Problems ◽

Positive Displacement ◽

Dynamic Type ◽

Hydraulic Machines ◽

Agricultural Water Supply

Study guide corresponds to the program discipline "Hydraulics". Consists of two parts and is for carrying out practical and laboratory works. The first part provides material on the basics of the calculation of hydraulic machines, hydraulic drives of agricultural machinery, systems of land reclamation and hydraulic transport for development of skills of application of theoretical information to solve specific technical problems and development practices of hydraulic calculations. The second part contains material for the study of the methods and instruments for measuring pressure, the study of the equation of Bernoulli, determination of hydraulic resistance, the study of the structure and principles of operation of positive displacement pumps and dynamic-type, cylinders, volumetric hydraulic drive and hydrodynamic transmission elements and schemes of irrigation systems and agricultural water supply. To conduct practical and laboratory classes for students of all forms of training in the direction of training 35.03.06 "Agroengineering", as well as for graduate students, teachers and technical workers of agriculture.

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